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Use the billing-inquiries address on the back of your statement, not the payments address, and identify the account by name and last four digits only. State one request per letter, keep a copy with the delivery record, and send disputes promptly, since written billing disputes carry a deadline. The address on the envelope decides which department reads your letter, and that matters more than most people expect.
Credit card issuers run at least three mail streams, and they are not interchangeable. Payments go to a processing centre that only posts money. General correspondence goes to a customer service address. Billing disputes and error notices go to a billing-inquiries address, which is printed on the back of your statement or in your cardholder agreement. A dispute mailed to the payments address can sit unopened for weeks, or get filed as a payment with no action on the dispute itself. Before you seal the envelope, check the statement and use the address that matches your reason for writing.
| Reason for writing | Address to use | What to include |
|---|---|---|
| Dispute a charge or billing error | Billing-inquiries address on the statement | Charge date, amount, merchant name, and why it is wrong |
| Close the account | General correspondence address, or the closure address in the agreement | Written closure request, last four digits, and how to handle any remaining balance |
| Request a limit change or rate review | General correspondence address | The change requested and a short reason |
| Send a payment | Payments address only | Payment coupon or account reference, nothing else |
| Report a death or fraud | The dedicated address or phone route in the agreement | As little sensitive detail as possible in the first letter |
In the United States, the Fair Credit Billing Act gives you a window after the statement date to dispute a billing error in writing, and the issuer must acknowledge and investigate within set time frames. Your letter should name the charge by date, amount, and merchant, explain why it is wrong in one or two sentences (charged twice, goods never arrived, amount differs from the receipt), and state what you want: removal of the charge and any related interest or fees. Attach a copy of the receipt or the merchant correspondence if you have it. While the dispute is open, you generally do not have to pay the disputed amount, though you must keep paying the rest of the bill, a detail people often miss.
Canadian cardholders work under a different framework: the cardholder agreement and the issuer's complaint process, with the bank ombudsman as the next step if the issuer's answer is unsatisfactory. The practical advice is the same, though: put it in writing, keep the delivery record, and do it promptly.
A written closure request should say plainly that you want the account closed, give your name and the last four digits of the card, and ask for written confirmation of the closure and of the final balance. Two points trip people up. First, closing a card does not erase any balance owed; interest keeps running until it is paid. Second, some issuers keep a closed account on your credit file for years, which can actually help your credit history, so ask in the letter how the closure will be reported. If you are closing because of fraud or a billing fight, say so: the reason can matter to the next person who reviews your file.
Never include your full card number, your PIN, your online banking password, or your Social Insurance or Social Security number. Your name, address, and the last four digits of the card are enough for the issuer to find the account. Send copies of statements and receipts, never originals, and keep a copy of the letter plus the Certified Mail receipt in the US or the Registered Mail record in Canada. If the issuer later claims it never got your dispute, that delivery record is the answer.
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